1. Spectroscopy Department, Physics Division, National Research Centre (NRC), Elbuhouth Street, Giza 12622, Egypt
2. Departments of Forest Biomaterials and Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
3. Textile Research Division, National Research Centre (NRC), Elbuhouth Street, Giza 12622, Egypt
4. Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.
O. Box 16300, FI-00076 Espoo, Finland
5. Department of Applied Physics, School of Science, Aalto University, P. O. Box 13500, FI-00076 Espoo, Finland